data = d3
.tsv(
"https://media.githubusercontent.com/media/Caster/growing-glyphs/master/input/csv/italian-renaissance-architecture.tsv",
p => ({
...p,
lat: parseFloat(p.latitude),
lng: parseFloat(p.longitude)
})
)
.then(d => d.filter(p => !(isNaN(p.lat) || isNaN(p.lng))))